[submodule]: update sonic-utilities

* 8119ba2 2021-01-20 | Validations checks while creating and deleting a Portchannel (sonic-net#1326) (HEAD, origin/master, origin/HEAD) [Akhilesh Samineni]
* 3df267e 2021-01-19 | [config] Fix Breakout mode option and BREAKOUT_CFG table check method (sonic-net#1270) [Sangita Maity]
* 9bd709b 2021-01-19 | [show] Fix show arp in case with FDB entries, linked to default VLAN (sonic-net#1357) [maksymbelei95]
* bc2d27e 2021-01-18 | [generate_dump]: fix syntax error [Guohan Lu]

Signed-off-by: Guohan Lu <lguohan@gmail.com>